Specifications

— 42 —
Pin No. Name I/O Function
1 VDD1 I Power supply to Gate array (5 V)
2 V5WEB O not used
3 V5A20 O not used
4 BSYB I not used
5 V5A21 O not used
6 V5A16 O Address bus to ROM for MODEM
7 V5A22 O not used
8 V5A15 O Address bus to ROM for MODEM
9 VSS Ground for Gate array
10 V5A23 O ER (Request signal to MODEM for operation of MODEM)
11 V5A12 O Address bus to ROM for MODEM
12 V5A24 O RS (Request signal to MODEM for sending data)
13 V5A7 O Address bus to ROM for MODEM
14 V5A25 O SD (Data to send from BN Unit to MODEM)
15 V5A6 O Address bus to ROM for MODEM
16 V5A5 O Address bus to ROM for MODEM
17 PORT0 I RESET signal from CPU (LSI1)
18 VDD2 I Power supply to Gate array (3 V)
19 VSS Ground for Gate array
20 RESET O RESET signal to IC for MODEM
21 V5A4 O Address bus to ROM for MODEM
22 V5A3 O Address bus to ROM for MODEM
23 INPACKB I RD (Data to send from MODEM to BN Unit)
24 V5A2 O Address bus to ROM for MODEM
25 REGB O not used
26 V5A1 O Address bus to ROM for MODEM
27 BVD2 I DR (OK signal from MODEM in response to ER)
28 V5A0 O Address bus to ROM for MODEM
29 BVD1 I CD (Information signal from MODEM to BN Unit (Detection of carrier))
30 VSS Ground for Gate array
31 CD2B I not used
32 V5D8 I/O not used
33 V5D1 I/O Data bus for ROM of MODEM
34 V5D9 I/O not used
35 V5D2 I/O Data bus for ROM of MODEM
36 V5D10 I/O not used
37 VDD1 I Power supply to Gate array (5 V)
38 P3 I Clock (10 MHz) from CPU
39 ~ 44 D10 ~ D15 I/O Data bus for CPU
45 VSS Ground for Gate array
46 V5WAITB I not used
47 ~ 53 D3 ~ D9 I/O Data bus for CPU
54 VDD2 I Power supply to Gate array (3 V)
55 VSS Ground for Gate array
56 ~ 58 D0 ~ D2 I/O Data bus for CPU
59 CS6B I Chip select signal to LSI for MODEM passing trough Gate array
60 WEB I Write enable signal from CPU
61 OEB I Output enable signal from CPU
62 CS1B I Chip select signal from CPU
63 P5 O Control signal to power supply to MODEM (5 V ON/OFF)
64 V5D0 I/O Data bus for ROM of MODEM
65 VDD1 I Power supply to Gate array (5 V)
66 VSS Ground for Gate array
8-2. Gate Array (LSI2)
Gate array: FM3416